“Ecologists and botanists may speak of "habitat jizz" or the jizz of a plant.”

“dismissed by many as some kind of birding alchemy, there is some physical basis to the idea of jizz.”

“Experienced birders can often make reliable identifications in the field at a glance by using jizz. Often jizz is useful for identifying to the family or genus level, rather than the species level, as in: "It definitely had the jizz of a thrush, but I couldn't see what kind."”